[jQuery] Get vars from one event function to another

[Nic Hubbard]

I am confused about how to do this the right way.

I have a change event which grabs the value of the selected option
list and sets that as a var.  But, I would like to add that to the end
of my post string when I submit the form, how would I do this?

$('select').change(function() {

        $('select option:selected').each(function() {

                var my_val = $(this).val();

        });//end each

});//end change

$('#my_submit').submit(function() {

        var action = $('form').attr('action');
        // How do I get my_val variable into here??
        $('form').attr('action', action + 'new_parm=' + my_val);

});